2 * Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20 #include <linux/kernel.h>
22 #include <linux/spinlock.h>
23 #include <linux/skbuff.h>
24 #include <linux/leds.h>
25 #include <linux/usb.h>
26 #include <net/mac80211.h>
29 #define MT_TX_RING_SIZE 256
30 #define MT_MCU_RING_SIZE 32
31 #define MT_RX_BUF_SIZE 2048
36 struct mt76_reg_pair {
47 u32 (*rr)(struct mt76_dev *dev, u32 offset);
48 void (*wr)(struct mt76_dev *dev, u32 offset, u32 val);
49 u32 (*rmw)(struct mt76_dev *dev, u32 offset, u32 mask, u32 val);
50 void (*copy)(struct mt76_dev *dev, u32 offset, const void *data,
52 int (*wr_rp)(struct mt76_dev *dev, u32 base,
53 const struct mt76_reg_pair *rp, int len);
54 int (*rd_rp)(struct mt76_dev *dev, u32 base,
55 struct mt76_reg_pair *rp, int len);
56 enum mt76_bus_type type;
59 #define mt76_is_usb(dev) ((dev)->mt76.bus->type == MT76_BUS_USB)
60 #define mt76_is_mmio(dev) ((dev)->mt76.bus->type == MT76_BUS_MMIO)
63 MT_TXQ_VO = IEEE80211_AC_VO,
64 MT_TXQ_VI = IEEE80211_AC_VI,
65 MT_TXQ_BE = IEEE80211_AC_BE,
66 MT_TXQ_BK = IEEE80211_AC_BK,
80 struct mt76_queue_buf {
92 struct mt76_queue_entry {
98 struct mt76_txwi_cache *txwi;
99 struct mt76u_buf ubuf;
104 struct mt76_queue_regs {
109 } __packed __aligned(4);
112 struct mt76_queue_regs __iomem *regs;
115 struct mt76_queue_entry *entry;
116 struct mt76_desc *desc;
118 struct list_head swq;
132 struct sk_buff *rx_head;
133 struct page_frag_cache rx_page;
134 spinlock_t rx_page_lock;
137 struct mt76_mcu_ops {
138 int (*mcu_send_msg)(struct mt76_dev *dev, int cmd, const void *data,
139 int len, bool wait_resp);
140 int (*mcu_wr_rp)(struct mt76_dev *dev, u32 base,
141 const struct mt76_reg_pair *rp, int len);
142 int (*mcu_rd_rp)(struct mt76_dev *dev, u32 base,
143 struct mt76_reg_pair *rp, int len);
146 struct mt76_queue_ops {
147 int (*init)(struct mt76_dev *dev);
149 int (*alloc)(struct mt76_dev *dev, struct mt76_queue *q);
151 int (*add_buf)(struct mt76_dev *dev, struct mt76_queue *q,
152 struct mt76_queue_buf *buf, int nbufs, u32 info,
153 struct sk_buff *skb, void *txwi);
155 int (*tx_queue_skb)(struct mt76_dev *dev, struct mt76_queue *q,
156 struct sk_buff *skb, struct mt76_wcid *wcid,
157 struct ieee80211_sta *sta);
159 void *(*dequeue)(struct mt76_dev *dev, struct mt76_queue *q, bool flush,
160 int *len, u32 *info, bool *more);
162 void (*rx_reset)(struct mt76_dev *dev, enum mt76_rxq_id qid);
164 void (*tx_cleanup)(struct mt76_dev *dev, enum mt76_txq_id qid,
167 void (*kick)(struct mt76_dev *dev, struct mt76_queue *q);
170 enum mt76_wcid_flags {
171 MT_WCID_FLAG_CHECK_PS,
175 #define MT76_N_WCIDS 128
178 struct mt76_rx_tid __rcu *aggr[IEEE80211_NUM_TIDS];
180 struct work_struct aggr_work;
190 u8 rx_key_pn[IEEE80211_NUM_TIDS][6];
202 struct list_head list;
203 struct mt76_queue *hwq;
204 struct mt76_wcid *wcid;
206 struct sk_buff_head retry_q;
213 struct mt76_txwi_cache {
216 struct list_head list;
221 struct rcu_head rcu_head;
223 struct mt76_dev *dev;
226 struct delayed_work reorder_work;
232 u8 started:1, stopped:1, timer_pending:1;
234 struct sk_buff *reorder_buf[];
237 #define MT_TX_CB_DMA_DONE BIT(0)
238 #define MT_TX_CB_TXS_DONE BIT(1)
239 #define MT_TX_CB_TXS_FAILED BIT(2)
241 #define MT_PACKET_ID_MASK GENMASK(7, 0)
242 #define MT_PACKET_ID_NO_ACK MT_PACKET_ID_MASK
244 #define MT_TX_STATUS_SKB_TIMEOUT HZ
247 unsigned long jiffies;
254 MT76_STATE_INITIALIZED,
256 MT76_STATE_MCU_RUNNING,
269 struct mt76_driver_ops {
272 void (*update_survey)(struct mt76_dev *dev);
274 int (*tx_prepare_skb)(struct mt76_dev *dev, void *txwi_ptr,
275 struct sk_buff *skb, struct mt76_queue *q,
276 struct mt76_wcid *wcid,
277 struct ieee80211_sta *sta, u32 *tx_info);
279 void (*tx_complete_skb)(struct mt76_dev *dev, struct mt76_queue *q,
280 struct mt76_queue_entry *e, bool flush);
282 bool (*tx_status_data)(struct mt76_dev *dev, u8 *update);
284 void (*rx_skb)(struct mt76_dev *dev, enum mt76_rxq_id q,
285 struct sk_buff *skb);
287 void (*rx_poll_complete)(struct mt76_dev *dev, enum mt76_rxq_id q);
289 void (*sta_ps)(struct mt76_dev *dev, struct ieee80211_sta *sta,
292 int (*sta_add)(struct mt76_dev *dev, struct ieee80211_vif *vif,
293 struct ieee80211_sta *sta);
295 void (*sta_remove)(struct mt76_dev *dev, struct ieee80211_vif *vif,
296 struct ieee80211_sta *sta);
299 struct mt76_channel_state {
305 struct ieee80211_supported_band sband;
306 struct mt76_channel_state *chan;
309 struct mt76_rate_power {
323 #define MT_VEND_TYPE_EEPROM BIT(31)
324 #define MT_VEND_TYPE_CFG BIT(30)
325 #define MT_VEND_TYPE_MASK (MT_VEND_TYPE_EEPROM | MT_VEND_TYPE_CFG)
327 #define MT_VEND_ADDR(type, n) (MT_VEND_TYPE_##type | (n))
329 MT_VEND_DEV_MODE = 0x1,
331 MT_VEND_MULTI_WRITE = 0x6,
332 MT_VEND_MULTI_READ = 0x7,
333 MT_VEND_READ_EEPROM = 0x9,
334 MT_VEND_WRITE_FCE = 0x42,
335 MT_VEND_WRITE_CFG = 0x46,
336 MT_VEND_READ_CFG = 0x47,
346 MT_EP_OUT_INBAND_CMD,
355 #define MT_SG_MAX_SIZE 8
356 #define MT_NUM_TX_ENTRIES 256
357 #define MT_NUM_RX_ENTRIES 128
358 #define MCU_RESP_URB_SIZE 1024
360 struct mutex usb_ctrl_mtx;
363 struct tasklet_struct rx_tasklet;
364 struct tasklet_struct tx_tasklet;
365 struct delayed_work stat_work;
367 u8 out_ep[__MT_EP_OUT_MAX];
369 u8 in_ep[__MT_EP_IN_MAX];
374 struct completion cmpl;
375 struct mt76u_buf res;
379 struct mt76_reg_pair *rp;
390 wait_queue_head_t wait;
391 struct sk_buff_head res_q;
401 struct ieee80211_hw *hw;
402 struct cfg80211_chan_def chandef;
403 struct ieee80211_channel *main_chan;
410 const struct mt76_bus_ops *bus;
411 const struct mt76_driver_ops *drv;
412 const struct mt76_mcu_ops *mcu_ops;
415 struct net_device napi_dev;
417 struct napi_struct napi[__MT_RXQ_MAX];
418 struct sk_buff_head rx_skb[__MT_RXQ_MAX];
420 struct list_head txwi_cache;
421 struct mt76_queue q_tx[__MT_TXQ_MAX];
422 struct mt76_queue q_rx[__MT_RXQ_MAX];
423 const struct mt76_queue_ops *queue_ops;
425 wait_queue_head_t tx_wait;
426 struct sk_buff_head status_list;
428 unsigned long wcid_mask[MT76_N_WCIDS / BITS_PER_LONG];
430 struct mt76_wcid global_wcid;
431 struct mt76_wcid __rcu *wcid[MT76_N_WCIDS];
433 u8 macaddr[ETH_ALEN];
440 struct mt76_sband sband_2g;
441 struct mt76_sband sband_5g;
442 struct debugfs_blob_wrapper eeprom;
443 struct debugfs_blob_wrapper otp;
444 struct mt76_hw_cap cap;
446 struct mt76_rate_power rate_power;
452 struct led_classdev led_cdev;
460 struct mt76_mmio mmio;
473 struct mt76_rx_status {
474 struct mt76_wcid *wcid;
476 unsigned long reorder_time;
493 s8 chain_signal[IEEE80211_MAX_CHAINS];
496 #define __mt76_rr(dev, ...) (dev)->bus->rr((dev), __VA_ARGS__)
497 #define __mt76_wr(dev, ...) (dev)->bus->wr((dev), __VA_ARGS__)
498 #define __mt76_rmw(dev, ...) (dev)->bus->rmw((dev), __VA_ARGS__)
499 #define __mt76_wr_copy(dev, ...) (dev)->bus->copy((dev), __VA_ARGS__)
501 #define __mt76_set(dev, offset, val) __mt76_rmw(dev, offset, 0, val)
502 #define __mt76_clear(dev, offset, val) __mt76_rmw(dev, offset, val, 0)
504 #define mt76_rr(dev, ...) (dev)->mt76.bus->rr(&((dev)->mt76), __VA_ARGS__)
505 #define mt76_wr(dev, ...) (dev)->mt76.bus->wr(&((dev)->mt76), __VA_ARGS__)
506 #define mt76_rmw(dev, ...) (dev)->mt76.bus->rmw(&((dev)->mt76), __VA_ARGS__)
507 #define mt76_wr_copy(dev, ...) (dev)->mt76.bus->copy(&((dev)->mt76), __VA_ARGS__)
508 #define mt76_wr_rp(dev, ...) (dev)->mt76.bus->wr_rp(&((dev)->mt76), __VA_ARGS__)
509 #define mt76_rd_rp(dev, ...) (dev)->mt76.bus->rd_rp(&((dev)->mt76), __VA_ARGS__)
511 #define mt76_mcu_send_msg(dev, ...) (dev)->mt76.mcu_ops->mcu_send_msg(&((dev)->mt76), __VA_ARGS__)
513 #define mt76_set(dev, offset, val) mt76_rmw(dev, offset, 0, val)
514 #define mt76_clear(dev, offset, val) mt76_rmw(dev, offset, val, 0)
516 #define mt76_get_field(_dev, _reg, _field) \
517 FIELD_GET(_field, mt76_rr(dev, _reg))
519 #define mt76_rmw_field(_dev, _reg, _field, _val) \
520 mt76_rmw(_dev, _reg, _field, FIELD_PREP(_field, _val))
522 #define __mt76_rmw_field(_dev, _reg, _field, _val) \
523 __mt76_rmw(_dev, _reg, _field, FIELD_PREP(_field, _val))
525 #define mt76_hw(dev) (dev)->mt76.hw
527 bool __mt76_poll(struct mt76_dev *dev, u32 offset, u32 mask, u32 val,
530 #define mt76_poll(dev, ...) __mt76_poll(&((dev)->mt76), __VA_ARGS__)
532 bool __mt76_poll_msec(struct mt76_dev *dev, u32 offset, u32 mask, u32 val,
535 #define mt76_poll_msec(dev, ...) __mt76_poll_msec(&((dev)->mt76), __VA_ARGS__)
537 void mt76_mmio_init(struct mt76_dev *dev, void __iomem *regs);
539 static inline u16 mt76_chip(struct mt76_dev *dev)
541 return dev->rev >> 16;
544 static inline u16 mt76_rev(struct mt76_dev *dev)
546 return dev->rev & 0xffff;
549 #define mt76xx_chip(dev) mt76_chip(&((dev)->mt76))
550 #define mt76xx_rev(dev) mt76_rev(&((dev)->mt76))
552 #define mt76_init_queues(dev) (dev)->mt76.queue_ops->init(&((dev)->mt76))
553 #define mt76_queue_alloc(dev, ...) (dev)->mt76.queue_ops->alloc(&((dev)->mt76), __VA_ARGS__)
554 #define mt76_queue_add_buf(dev, ...) (dev)->mt76.queue_ops->add_buf(&((dev)->mt76), __VA_ARGS__)
555 #define mt76_queue_rx_reset(dev, ...) (dev)->mt76.queue_ops->rx_reset(&((dev)->mt76), __VA_ARGS__)
556 #define mt76_queue_tx_cleanup(dev, ...) (dev)->mt76.queue_ops->tx_cleanup(&((dev)->mt76), __VA_ARGS__)
557 #define mt76_queue_kick(dev, ...) (dev)->mt76.queue_ops->kick(&((dev)->mt76), __VA_ARGS__)
559 static inline struct mt76_channel_state *
560 mt76_channel_state(struct mt76_dev *dev, struct ieee80211_channel *c)
562 struct mt76_sband *msband;
565 if (c->band == NL80211_BAND_2GHZ)
566 msband = &dev->sband_2g;
568 msband = &dev->sband_5g;
570 idx = c - &msband->sband.channels[0];
571 return &msband->chan[idx];
574 struct mt76_dev *mt76_alloc_device(unsigned int size,
575 const struct ieee80211_ops *ops);
576 int mt76_register_device(struct mt76_dev *dev, bool vht,
577 struct ieee80211_rate *rates, int n_rates);
578 void mt76_unregister_device(struct mt76_dev *dev);
580 struct dentry *mt76_register_debugfs(struct mt76_dev *dev);
581 void mt76_seq_puts_array(struct seq_file *file, const char *str,
584 int mt76_eeprom_init(struct mt76_dev *dev, int len);
585 void mt76_eeprom_override(struct mt76_dev *dev);
587 /* increment with wrap-around */
588 static inline int mt76_incr(int val, int size)
590 return (val + 1) & (size - 1);
593 /* decrement with wrap-around */
594 static inline int mt76_decr(int val, int size)
596 return (val - 1) & (size - 1);
599 u8 mt76_ac_to_hwq(u8 ac);
601 static inline struct ieee80211_txq *
602 mtxq_to_txq(struct mt76_txq *mtxq)
606 return container_of(ptr, struct ieee80211_txq, drv_priv);
609 static inline struct ieee80211_sta *
610 wcid_to_sta(struct mt76_wcid *wcid)
614 if (!wcid || !wcid->sta)
617 return container_of(ptr, struct ieee80211_sta, drv_priv);
620 static inline struct mt76_tx_cb *mt76_tx_skb_cb(struct sk_buff *skb)
622 BUILD_BUG_ON(sizeof(struct mt76_tx_cb) >
623 sizeof(IEEE80211_SKB_CB(skb)->status.status_driver_data));
624 return ((void *) IEEE80211_SKB_CB(skb)->status.status_driver_data);
627 int mt76_dma_tx_queue_skb(struct mt76_dev *dev, struct mt76_queue *q,
628 struct sk_buff *skb, struct mt76_wcid *wcid,
629 struct ieee80211_sta *sta);
631 void mt76_rx(struct mt76_dev *dev, enum mt76_rxq_id q, struct sk_buff *skb);
632 void mt76_tx(struct mt76_dev *dev, struct ieee80211_sta *sta,
633 struct mt76_wcid *wcid, struct sk_buff *skb);
634 void mt76_txq_init(struct mt76_dev *dev, struct ieee80211_txq *txq);
635 void mt76_txq_remove(struct mt76_dev *dev, struct ieee80211_txq *txq);
636 void mt76_wake_tx_queue(struct ieee80211_hw *hw, struct ieee80211_txq *txq);
637 void mt76_stop_tx_queues(struct mt76_dev *dev, struct ieee80211_sta *sta,
639 void mt76_txq_schedule(struct mt76_dev *dev, struct mt76_queue *hwq);
640 void mt76_txq_schedule_all(struct mt76_dev *dev);
641 void mt76_release_buffered_frames(struct ieee80211_hw *hw,
642 struct ieee80211_sta *sta,
643 u16 tids, int nframes,
644 enum ieee80211_frame_release_type reason,
646 void mt76_set_channel(struct mt76_dev *dev);
647 int mt76_get_survey(struct ieee80211_hw *hw, int idx,
648 struct survey_info *survey);
649 void mt76_set_stream_caps(struct mt76_dev *dev, bool vht);
651 int mt76_rx_aggr_start(struct mt76_dev *dev, struct mt76_wcid *wcid, u8 tid,
653 void mt76_rx_aggr_stop(struct mt76_dev *dev, struct mt76_wcid *wcid, u8 tid);
655 void mt76_wcid_key_setup(struct mt76_dev *dev, struct mt76_wcid *wcid,
656 struct ieee80211_key_conf *key);
658 void mt76_tx_status_lock(struct mt76_dev *dev, struct sk_buff_head *list)
659 __acquires(&dev->status_list.lock);
660 void mt76_tx_status_unlock(struct mt76_dev *dev, struct sk_buff_head *list)
661 __releases(&dev->status_list.lock);
663 int mt76_tx_status_skb_add(struct mt76_dev *dev, struct mt76_wcid *wcid,
664 struct sk_buff *skb);
665 struct sk_buff *mt76_tx_status_skb_get(struct mt76_dev *dev,
666 struct mt76_wcid *wcid, int pktid,
667 struct sk_buff_head *list);
668 void mt76_tx_status_skb_done(struct mt76_dev *dev, struct sk_buff *skb,
669 struct sk_buff_head *list);
670 void mt76_tx_complete_skb(struct mt76_dev *dev, struct sk_buff *skb);
671 void mt76_tx_status_check(struct mt76_dev *dev, struct mt76_wcid *wcid,
673 int mt76_sta_state(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
674 struct ieee80211_sta *sta,
675 enum ieee80211_sta_state old_state,
676 enum ieee80211_sta_state new_state);
678 struct ieee80211_sta *mt76_rx_convert(struct sk_buff *skb);
681 void mt76_tx_free(struct mt76_dev *dev);
682 struct mt76_txwi_cache *mt76_get_txwi(struct mt76_dev *dev);
683 void mt76_put_txwi(struct mt76_dev *dev, struct mt76_txwi_cache *t);
684 void mt76_rx_complete(struct mt76_dev *dev, struct sk_buff_head *frames,
685 struct napi_struct *napi);
686 void mt76_rx_poll_complete(struct mt76_dev *dev, enum mt76_rxq_id q,
687 struct napi_struct *napi);
688 void mt76_rx_aggr_reorder(struct sk_buff *skb, struct sk_buff_head *frames);
691 static inline bool mt76u_urb_error(struct urb *urb)
693 return urb->status &&
694 urb->status != -ECONNRESET &&
695 urb->status != -ESHUTDOWN &&
696 urb->status != -ENOENT;
699 /* Map hardware queues to usb endpoints */
700 static inline u8 q2ep(u8 qid)
702 /* TODO: take management packets to queue 5 */
706 static inline bool mt76u_check_sg(struct mt76_dev *dev)
708 struct usb_interface *intf = to_usb_interface(dev->dev);
709 struct usb_device *udev = interface_to_usbdev(intf);
711 return (udev->bus->sg_tablesize > 0 &&
712 (udev->bus->no_sg_constraint ||
713 udev->speed == USB_SPEED_WIRELESS));
716 int mt76u_vendor_request(struct mt76_dev *dev, u8 req,
717 u8 req_type, u16 val, u16 offset,
718 void *buf, size_t len);
719 void mt76u_single_wr(struct mt76_dev *dev, const u8 req,
720 const u16 offset, const u32 val);
721 int mt76u_init(struct mt76_dev *dev, struct usb_interface *intf);
722 void mt76u_deinit(struct mt76_dev *dev);
723 int mt76u_buf_alloc(struct mt76_dev *dev, struct mt76u_buf *buf,
724 int nsgs, int len, int sglen, gfp_t gfp);
725 void mt76u_buf_free(struct mt76u_buf *buf);
726 int mt76u_submit_buf(struct mt76_dev *dev, int dir, int index,
727 struct mt76u_buf *buf, gfp_t gfp,
728 usb_complete_t complete_fn, void *context);
729 int mt76u_submit_rx_buffers(struct mt76_dev *dev);
730 int mt76u_alloc_queues(struct mt76_dev *dev);
731 void mt76u_stop_queues(struct mt76_dev *dev);
732 void mt76u_stop_stat_wk(struct mt76_dev *dev);
733 void mt76u_queues_deinit(struct mt76_dev *dev);
735 void mt76u_mcu_complete_urb(struct urb *urb);
736 int mt76u_mcu_init_rx(struct mt76_dev *dev);
737 void mt76u_mcu_deinit(struct mt76_dev *dev);